What is the size of the eraser on a number 2 pencil?

The size of the eraser on a number 2 pencil is typically around 4 to 5 millimeters in diameter. This eraser is made of a synthetic rubber compound that is designed to effectively erase pencil marks without smudging or tearing the paper. The eraser is securely attached to the end of the pencil with a metal ferrule, ensuring durability and ease of use.